Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
IronPort-SDR: h02GEKXhz7PnlkLtprUzH4Ctpq4WyGcObZ5l69rwBWGi/5KYHA6/IIbxnJKo3aVZShYaXe98wq
 a3tOHPu7/rIg==
IronPort-SDR: UVcgZx6Mh8VNXsKxOuwCi7v3mwayVYbsmLU3IHNTNFqkVJpQk7Ldt6TG8oRRTCzl3hv9h3ql7l
 4XZTmsueq5mw==
Subject: Re: snd_hda_intel/sst-acpi sound breakage on suspend/resume since
 5.6-rc1
To:     Dominik Brodowski <linux@dominikbrodowski.net>
Cc:     cezary.rojewski@intel.com, alsa-devel@alsa-project.org,
        curtis@malainey.com, Keyon Jie <yang.jie@linux.intel.com>,
        tiwai@suse.com, linux-kernel@vger.kernel.org,
        liam.r.girdwood@linux.intel.com, broonie@kernel.org
References: <20200318063022.GA116342@light.dominikbrodowski.net>
 <41d0b2b5-6014-6fab-b6a2-7a7dbc4fe020@linux.intel.com>
 <20200318123930.GA2433@light.dominikbrodowski.net>
 <d7a357c5-54af-3e69-771c-d7ea83c6fbb7@linux.intel.com>
 <20200318162029.GA3999@light.dominikbrodowski.net>
From:   Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Message-ID: <d974b46b-2899-03c2-0e98-88237f23f1e2@linux.intel.com>
Date:   Wed, 18 Mar 2020 12:08:24 -0500
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101
 Thunderbird/68.4.1
MIME-Version: 1.0
In-Reply-To: <20200318162029.GA3999@light.dominikbrodowski.net>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk


On 3/18/20 11:20 AM, Dominik Brodowski wrote:
> On Wed, Mar 18, 2020 at 10:13:54AM -0500, Pierre-Louis Bossart wrote:
>>
>>
>>>>> While 5.5.x works fine, mainline as of ac309e7744be (v5.6-rc6+) causes me
>>>>> some sound-related trouble: after boot, the sound works fine -- but once I
>>>>> suspend and resume my broadwell-based XPS13, I need to switch to headphone
>>>>> and back to speaker to hear something. But what I hear isn't music but
>>>>> garbled output.
>>
>> It's my understanding that the use of the haswell driver is opt-in for Dell
>> XPS13 9343. When we run the SOF driver on this device, we have to explicitly
>> bypass an ACPI quirk that forces HDAudio to be used:
>>
>> https://github.com/thesofproject/linux/commit/944b6a2d620a556424ed4195c8428485fcb6c2bd
>>
>> Have you tried to run in plain vanilla HDAudio mode?
> 
> I had (see 18d78b64fddc), but not any more in years (and I'd like to keep
> using I2S, which has worked flawlessly in these years).

ok. I don't think Intel folks have this device available, or it's used 
for other things, but if you want to bisect on you may want to use [1] 
to solve DRM issues. I used it to make Broadwell/Samus work again with SOF.

[1] 
https://gitlab.freedesktop.org/drm/intel/uploads/ef10c6c27fdc53d114f827bb72b078aa/0001-drm-i915-psr-Force-PSR-probe-only-after-full-initial.patch.txt

An alternate path would be to switch to SOF. It's still viewed as a 
developer option but Broadwell/Samus work reliably for me and we have a 
Broadwell-rt286 platform used for CI.